Exam (elaborations)
COS2621 Exam Notes.
- Course
- Computer Organisation
- Institution
- University Of South Africa
COS2621 Exam Notes. 100% CORRECT questions, answers, workings and explanations.
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COS2621 Exam Notes.,COS2621 EXAM PAPER NOTES pages refer to PDF unless otherwise specified Nov2019
MAY/JUNE 2019 MCQ
1.1. [p396]
The flip- flop is a bi-stable device. It exists in one of two states and, in the absence of input, remains in that
state. Thus, the flip- flop can function as a 1-bit memory.
The flip- flop has two outputs, which are always the complements of each other. These are generally
labelled Q and Q́ .
1.2. [p416]
Arithmetic instructions provide computational capabilities for processing numeric data.
1.3. [not in book]
NASM is an ASSEMBLER while DEBUG is a UTILITY TO ASSEMBLE AND DEBUG PROGRAMS
1.4.
Running the program:
Step 1: Type this shit into a text file
Step 2: Save .txt file into .asm file
Step 3: run DOSBox
Step 4: mount c c:\c2621 (where my folder is)
Step 5: c: (moves you to that folder)
Step 6: as fileName (turns .asm to .lst)
Step 7:
for DEBUG
debug q14.com
type "u" to step through code
for running
q14.com
SOLUTION
1. 71h stored in position 101h, EFh stored in position 100h
, COS2621 EXAM PAPER NOTES pages refer to PDF unless otherwise specified Nov2019
Okay so it will be stored as follows:
dw 0x71EF
71 is stored in location 101h
EF is stored in location 100h
(since org 0x100)
This would make NASM little-endian since ...
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